How long has it been since someone told you to “sit up straight”? Kids get advice on their posture all the time, but some adults could definitely use a reminder. People who slouch throughout the day can be vulnerable to a wide variety of problems, including back pain. If your back aches, you just might be able to relieve your pain by straightening up your act. How does poor posture cause back pain? When everything is properly aligned, the joints and muscles in your back easily share the burden of supporting your body weight. Poor posture disrupts this balance. As reported by the Cleveland Clinic, slumping forces the muscles and tendons in the lower back to work harder than usual, raising the risk of sprains and strains. Poor posture can also cause unnatural wear between joints, potentially setting the stage for arthritis. What can I do to improve my posture? …